A saw blade surface automatic grinding and polishing device

Abstract

The present invention relates to the technical field of polishing equipment, and specifically to an automatic grinding and polishing device for a saw blade surface, comprising a frame, a base, a clamp, a turntable, a main arm and a polishing motor, wherein a driving wheel, a tensioning wheel, a contact wheel, a main sand belt, a transmission module, a secondary arm and a positioning module are installed on the main arm, wherein the transmission module is located above the turntable, and a key wheel is installed on the transmission module, the secondary arm is located on the left side of the main arm, and the positioning module is located between the secondary arm and the turntable, wherein a contact wheel and a tensioning wheel are installed on the secondary arm from front to back, and a secondary sand belt is wound around the key wheel and the contact wheel and the tensioning wheel on the secondary arm, the contact wheel on the main arm is coaxially arranged with the contact wheel on the secondary arm, and a distance value from the right side surface of the secondary sand belt to the symmetry plane of the main sand belt is greater than the radius of the saw blade workpiece, and the present invention realizes uniform wear of the sand belt during the polishing process and improves the polishing efficiency of the saw blade surface by adding sand belts and simplifying the polishing path of the sand belts.

Description

Technical Field

[0001] The invention relates to the technical field of polishing equipment, in particular to an automatic grinding and polishing device for the surface of a saw blade. Background Art

[0002] Saw blade production usually includes cutting, heat treatment, polishing and welding processes. Polishing occurs after heat treatment. The purpose is to improve the smoothness of the saw blade surface to reduce the resistance between the saw blade and the cutting material during use, thereby reducing friction and vibration, thereby improving the overall performance of the saw blade.

[0003] The automatic grinding and polishing device for saw blade surface can be divided into grinding wheel type and sanding belt type according to the classification of polishing tools. Compared with the rigid contact between the grinding wheel and the workpiece, the sanding belt, as an elastic abrasive, can improve the integrity of the polished surface and reduce the residual stress of the polished surface. Therefore, in terms of improving the polishing quality of the saw blade surface, the sanding belt type has broader prospects.

[0004] The automatic grinding and polishing device for the surface of an abrasive belt saw blade usually includes a clamp, a turntable and an abrasive belt roller group. The clamp drives the saw blade to rotate, and the abrasive belt rotates on the abrasive belt roller group and contacts the surface of the saw blade through the rotation of the turntable. Then the turntable reciprocates laterally, so that the abrasive belt moves back and forth between the edge and the center of the saw blade to complete the polishing of the saw blade surface. This method not only shortens the lateral movement stroke of the abrasive belt during the polishing process, thereby making the installation of the equipment more compact, but also makes the edge of the abrasive belt alternately at the front end of the lateral movement through the lateral reciprocation of the abrasive belt, thereby making the wear on both sides of the abrasive belt similar, thereby weakening the phenomenon that severe wear on one side causes the life of the abrasive belt to be shortened.

[0005] The existing belt polishing method can effectively reduce the problem of unilateral wear of the belt, but there is still room for further improvement: the polishing of the saw blade by the belt must go through two processes, "coming" and "returning", and the axial adjustment of the saw blade occurs before polishing. During the polishing process, the belt has no axial feed to the saw blade. Therefore, during the "coming" process, the belt will grind a greater amount of the saw blade surface, and accordingly, its own wear will also be greater, especially at the side edge at the front end of the belt movement. During the "returning" process, the wear on the other side of the belt will be reduced accordingly, which will still lead to severe unilateral wear of the belt and shorten its service life.

[0006] Therefore, an automatic saw blade surface grinding and polishing device is proposed. Summary of the invention

[0007] The purpose of the present invention is to provide an automatic grinding and polishing device for the surface of a saw blade, which solves the problem of severe wear on one side of the sanding belt resulting in a shortened service life. By adding sanding belts and simplifying the polishing path of the sanding belts, the sanding belts are evenly worn during the polishing process and the polishing efficiency of the saw blade surface is improved.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A saw blade surface automatic grinding and polishing device, used for polishing saw blade workpiece, comprises a frame, a base, a fixture, a turntable, a main arm and a polishing motor, the main arm is equipped with a driving wheel, a tensioning wheel, a contact wheel and a main sand belt, and also comprises a transmission module, a secondary arm and a positioning module, the transmission module is located above the turntable, and a key wheel is installed on the transmission module, the secondary arm is located on the left side of the main arm, the positioning module is located between the secondary arm and the turntable, the contact wheel and the tensioning wheel are installed on the secondary arm from front to back, the key wheel and the contact wheel and the tensioning wheel on the secondary arm are wound with a secondary sand belt, the contact wheel on the main arm is coaxially arranged with the contact wheel on the secondary arm, and the distance from the right side of the secondary sand belt to the symmetry plane of the main sand belt is greater than the radius of the saw blade;

[0010] The main sanding belt is caused to slide back to zero by the base so that its own symmetry surface coincides with the midpoint of the saw blade workpiece, and the transmission module is driven by the polishing motor to drive the driving wheel and the key wheel to rotate at the same speed at the same time. The main sanding belt and the auxiliary sanding belt move right with the base to polish the saw blade workpiece until the symmetry surface of the auxiliary sanding belt coincides with the midpoint of the saw blade workpiece. The main sanding belt and the auxiliary sanding belt polish the other saw blade workpiece as the base returns to zero.

[0011] In the prior art, saw blade grinding and polishing devices are usually set up with a single sanding belt (i.e., only having the main arm and the contact wheel, tension wheel, driving wheel and main sanding belt on the main arm in the present invention). The purpose of setting two sanding belts in the present invention is: 1. To make the sanding belt wear evenly while polishing the saw blade, thereby avoiding the influence of local excessive wear on the performance of the entire sanding belt (such as reduced polishing consistency, accelerated sanding belt wear speed, etc.), thereby improving the effective service life of the sanding belt. In this way, the replacement cycle of the sanding belt is extended, the operation of the polishing device is made more stable, and the consumption rate of the sanding belt is reduced, thereby reducing production costs; 2. The working process of the single sanding belt grinding and polishing device is usually: the sanding belt first slides from the edge of the saw blade to the center of the saw blade, and then slides from the center of the saw blade to the edge of the saw blade, that is, the sanding belt needs a round trip process to polish the saw blade. In contrast, the arrangement of the two sanding belts in the present scheme enables the sanding belt to only slide from the center of the saw blade to the edge of the saw blade (or from the edge to the center) to complete the polishing of the saw blade surface, thereby increasing the speed of grinding and polishing the saw blade surface to improve production efficiency;

[0012] After the two sanding belts are arranged, the driving method of the sanding belts should also be reconsidered. In the prior art, a motor is usually used to directly drive the driving wheel to drive the sanding belt. On this basis, there are many driving methods to choose from, such as using two motors to control the driving wheel and the key wheel respectively to drive the two sanding belts respectively; for example, using a motor, and installing the key wheel and the driving wheel on the same input shaft, and then letting the motor drive the input shaft; compared with this solution, the above solution 1 uses two motors, which is simple and direct, and can save the design of the transmission module, but it also has major disadvantages: first, the consistency of the operation of the two motors is difficult to guarantee. If the contact state of the two sanding belts and the saw blade is different, the consistency of the saw blade surface polishing cannot be guaranteed. Secondly, the purchase and operation of two motors will also increase the overall cost of the saw blade surface grinding and polishing device; in the above-mentioned solution 2, using one motor to drive the driving wheel and the key wheel at the same time can well avoid the problems in solution 1, but after the driving wheel and the key wheel are coaxially installed, the operating states of the two will also be consistent, which will lead to the following problems: In actual production, the fixture adsorbs the saw blade workpiece and drives the saw blade workpiece to rotate in a directional manner. If the rotation directions of the main sanding belt and the auxiliary sanding belt are consistent, then the relative rotation directions (same direction or reverse direction) between the two and the saw blade workpiece must be different, which will lead to differences in the relative speeds of the two contact positions with the saw blade workpiece, resulting in inconsistent polishing amounts at the two contact positions, resulting in poor consistency in the polishing of the saw blade surface;

[0013] Preferably, the output shaft of the polishing motor is arranged in the front-to-back direction, the transmission module comprises a driving tooth, a driven tooth, a right shaft and a left shaft, the driving tooth is mounted on the output shaft of the polishing motor, the two driven teeth are respectively meshed on the left and right sides of the driving tooth, the right shaft is inserted on the main arm, the driven tooth and the driving wheel on the right side of the driving tooth are both mounted on the right shaft, the left shaft passes through the driven tooth on the left side of the driving tooth, and the left shaft is mounted on the turntable, and the key wheel is mounted on the left shaft;

[0014] In the above scheme, two pairs of bevel gears are formed by means of a driving tooth and two driven teeth, so that the two driven teeth rotate in opposite directions at the same speed, thereby driving the main sanding belt and the auxiliary sanding belt to rotate in opposite directions at the same speed, so that the relative rotation direction of the two and the saw blade workpiece (usually both are in the opposite direction) is consistent, so as to improve the polishing quality of the saw blade surface.

[0015] Preferably, the outer diameters of the key wheel and the driving wheel are equal, the tensioning wheels on the auxiliary arm and the main arm are coaxially installed, and the main sanding belt and the auxiliary sanding belt are of the same material, length, width and thickness;

[0016] Through the above scheme, the specifications and installation conditions of the main sanding belt and the auxiliary sanding belt are completely consistent. On the one hand, the same main sanding belt and auxiliary sanding belt do not need to be distinguished, which facilitates procurement and installation; on the other hand, the operating conditions of the main sanding belt and the auxiliary sanding belt are consistent, that is, the grinding amount during polishing is consistent, and on the premise that the material, length, width and thickness of the two are the same, the lifespan of the two is also similar, thereby ensuring the consistency of the replacement cycle, thereby avoiding the frequent downtime caused by the intersection of replacement cycles.

[0017] Preferably, the tensioning wheel is installed on the left side of the auxiliary arm, and the contact wheel is installed on the left side of the auxiliary arm;

[0018] Through the above scheme, the auxiliary sanding belt is installed on the left side of the auxiliary arm. On the one hand, it is convenient to replace the auxiliary sanding belt, so that the auxiliary sanding belt does not need to bypass the driven teeth when replaced, thereby avoiding frequent disassembly and assembly of the driven teeth and the driving teeth, so that the transmission of the equipment is more stable and reliable, and the polishing quality of the equipment is guaranteed; on the other hand, under the same other arrangement conditions, compared with being arranged on the right side of the auxiliary arm, the auxiliary sanding belt can be located at the further left end, thereby polishing saw blade workpieces with larger outer diameters, thereby increasing the equipment's polishing ability for different saw blades.

[0019] Preferably, the spacing between the main sanding belt and the auxiliary sanding belt is half of the sum of the outer diameter of the saw blade workpiece and the diameter of the center hole of the saw blade workpiece;

[0020] Through the above scheme, the main sanding belt and the auxiliary sanding belt are in contact with each other at the same time during the sliding process, and are separated from the surface of the saw blade workpiece at the same time, so that the polishing states of the main sanding belt and the auxiliary sanding belt are synchronized, so that the meshing state of the two driven teeth and the driving teeth is always consistent, so as to avoid tilting or vibration caused by instability, which leads to a decrease in the consistency of the saw blade surface polishing.

[0021] If the auxiliary arm is only fixed on the turntable, the grinding and polishing equipment can only polish the saw blade workpiece with the rated outer diameter, thereby limiting the adaptability of the equipment to saw blade workpieces of different specifications; therefore, in order to solve the above problem and improve the automation capability of the equipment, the present invention is designed as follows:

[0022] Preferably, the positioning module comprises a positioning motor, a positioning screw, a positioning slide rail and a positioning slider, the positioning motor is installed on the left side of the turntable, the positioning screw is connected to the right side of the output shaft of the positioning motor, and the positioning screw passes through the auxiliary arm and is mounted on the turntable, the positioning slide rail is arranged above the turntable, the positioning slider is installed between the positioning slide rail and the auxiliary arm, the auxiliary arm is installed with a limiting frame, the limiting frame is arranged with two baffles in the left and right directions, the baffles are clearance-matched with the left shaft, and the key wheel is installed between the two baffles;

[0023] In the above scheme, the positioning screw is driven by the positioning motor to make the auxiliary arm slide left and right under the action of the positioning slide rail and the positioning slider, thereby adjusting the distance between the auxiliary arm and the main arm (that is, the distance between the auxiliary sanding belt and the main sanding belt) to adapt to saw blade workpieces with different outer diameters; in the above adjustment process, the contact wheel and the tensioning wheel on the auxiliary arm move with the movement of the auxiliary arm, and the key wheel is driven by the limit frame connected to the auxiliary arm.

[0024] Preferably, the left shaft includes a transmission section and a belt-changing section from right to left, the transmission section is configured as a spline structure, and the key wheel is provided with a spline groove matching the transmission section;

[0025] In the above scheme, the key wheel installed on the transmission section can ensure circumferential positioning (rotation driven by the left shaft) through the spline connection, and can also move axially. With the help of the connection of the limit frame, it moves together with the auxiliary arm, thereby completing the adjustment of the distance between the auxiliary sanding belt and the main sanding belt, so that the grinding and polishing equipment has the ability to automatically adapt to the outer diameter of the saw blade to be polished.

[0026] Preferably, the belt-changing section comprises a base, a connecting body and a separating body, wherein the base is connected to the left side of the transmission section, the connecting body is connected to the left side of the base, the separating body is clamped on the outside of the connecting body, and the shaft diameter of the base gradually increases from right to left to the diameter of the inner hole of the baffle and remains constant;

[0027] In the above scheme, the connecting body and the base body are detachably connected, such as a threaded connection; the separating body is mounted on a turntable by a bearing seat, and the connecting body is clamped inside the separating body, such as a regular hexagonal prism similar to a nut shape. When the connecting body and the separating body rotate on the bearing seat, the connecting body can be screwed out from the inside of the base body, thereby creating a gap between the base body and the separating body, thereby disassembling and installing the auxiliary sanding belt. In order to facilitate the above process, the axial diameter of the base body is designed so that the baffle can form a stable support for the base body.

[0028] Preferably, the positioning motor has a bidirectional rotation function, and the polishing motor has a shutdown self-locking function;

[0029] In the above scheme, the positioning motor adjusts the position of the auxiliary sanding belt through bidirectional rotation, which can achieve faster and more accurate adjustment compared to the unidirectional motor combined with the reciprocating screw; the self-locking function of the polishing motor when it stops is to limit the freedom of the base when disassembling the auxiliary sanding belt, thereby facilitating the separation of the connector from the base, thereby completing the disassembly and assembly of the auxiliary sanding belt.

[0030] Preferably, an elastic roller is installed between the auxiliary arm and the main arm, and the roller surface of the elastic roller is made of elastic water-absorbing material;

[0031] In the above scheme, by means of the contact between the elastic roller and the surface of the polished saw blade workpiece, on the one hand, the polishing liquid remaining on the surface of the saw blade workpiece during the polishing process is absorbed to play a role in cleaning after polishing; on the other hand, through flexible contact with the surface of the saw blade, the smoothness of the saw blade surface is further improved.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The present invention polishes the surface of the saw blade simultaneously with the main sanding belt and the auxiliary sanding belt, so that the main sanding belt and the auxiliary sanding belt can complete the polishing of a saw blade only through one "coming" or "returning" movement, without having to go through a complete "coming" and "returning" as in the prior art, thereby improving the polishing efficiency of the saw blade, and each "coming" or "returning" of the main sanding belt and the auxiliary sanding belt can polish a saw blade, instead of using the "coming" as a cushion for the "returning" in the polishing of the same saw blade as in the prior art, thereby making the side edges of the main sanding belt and the auxiliary sanding belt evenly worn during the "coming" or "returning" process, thereby extending the life of both.

[0034] 2. The present invention uses the meshing transmission of the driving tooth and the two driven teeth to make the main sanding belt and the auxiliary sanding belt rotate in opposite directions, thereby making the main sanding belt and the auxiliary sanding belt rotate in opposite directions to the rotating saw blade, so that the main sanding belt and the auxiliary sanding belt can grind and polish the saw blade surface to the same amount, and at the same time, the spacing between the main sanding belt and the auxiliary sanding belt is set to half of the sum of the outer diameter of the saw blade workpiece and the aperture of the center hole of the saw blade workpiece, thereby ensuring that the main sanding belt and the auxiliary sanding belt are in contact with or separated from the saw blade surface at the same time, so that the meshing state of the two driven teeth and the driving tooth is consistent, so as to ensure the polishing quality of the saw blade surface.

[0035] 3. The present invention forms an axial limit for the key wheel through the setting of the baffle plate, so that the key wheel follows the auxiliary sanding belt to move left and right to polish saw blades with different outer diameters, and can form a stable support for the left shaft when disassembling and assembling the auxiliary sanding belt, thereby facilitating the replacement of the auxiliary sanding belt. Moreover, since the additional auxiliary sanding belt shares the wear of the main sanding belt in one polishing, the main sanding belt and the auxiliary sanding belt can effectively polish more saw blades, thereby extending the replacement cycle and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall isometric structure of the present invention;

[0037] Figure 2 For the present invention Figure 1 The enlarged schematic diagram of part A in the middle;

[0038] Figure 3 It is a schematic diagram of the overall structure of the present invention from top view;

[0039] Figure 4 For the present invention Figure 1 The enlarged schematic diagram of part B in the middle;

[0040] Figure 5 It is a schematic diagram of the auxiliary sand belt disassembly and assembly state of the present invention;

[0041] Figure 6 For the present invention Figure 5 The enlarged schematic diagram of part C in the middle;

[0042] Figure 7 It is a schematic diagram of the overlapping state of the polishing positions of the main abrasive belt and the auxiliary abrasive belt of the present invention;

[0043] Figure 8 It is a schematic diagram of the polishing state of the present invention.

[0044] In the figure: 1. frame; 2. base; 3. fixture; 4. turntable; 5. main arm; 6. polishing motor; 7. driving wheel; 8. tensioning wheel; 9. contact wheel; 10. main sanding belt; 11. transmission module; 111. driving gear; 112. driven gear; 113. right shaft; 114. left shaft; 1141. transmission section; 1142. belt changing section; 11421. base; 11422. connecting body; 11423. separating body; 12. auxiliary arm; 121. limiting frame; 122. baffle; 13. positioning module; 131. positioning motor; 132. positioning screw; 133. positioning slide rail; 134. positioning slider; 14. key wheel; 15. auxiliary sanding belt; 16. saw blade workpiece; 17. elastic roller. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] See also Figures 1 to 8 The present invention provides a saw blade surface automatic grinding and polishing device, and the technical solution is as follows:

[0047] A saw blade surface automatic grinding and polishing device is used to polish a saw blade workpiece 16, comprising a frame 1, a base 2, a fixture 3, a turntable 4, a main arm 5 and a polishing motor 6. The base 2 is located above the frame 1 and is connected to the frame 1 through a slide rail and a slider so that it can slide in the left and right directions. The driving device of the base 2 comprises a motor, a steering box and a lead screw. The steering box is connected between the motor and the lead screw to play a transmission switching role. When working, the motor rotates in a directional manner, and the lead screw pushes the base 2 to slide in a directional manner on the guide rail of the frame 1 to complete the forward stroke. , then, the steering box switches the transmission direction, and the lead screw rotates in the opposite direction while the motor maintains the steering direction, thereby driving the base 2 to complete the reverse stroke; the fixture 3 is located on the front side of the base 2, and magnets and pads are usually arranged on the fixture 3. The function of the magnet is to absorb the saw blade workpiece 16 on the fixture 3 to ensure the stability of the saw blade workpiece 16 during the polishing process, and the function of the pad is to raise the saw blade workpiece 16, and by switching pads of different thicknesses, the saw blade workpiece 16 of different thicknesses can be positioned to the accurate polishing position. When working, the fixture 3 occurs The turntable 4 is mounted on the base 2 through a pair of bearing seats, and a cylinder is usually used to drive the turntable 4 to raise and lower the turntable 4 (when it is raised, the saw blade workpiece 16 is placed on the fixture 3, and when it is lowered, the saw blade workpiece 16 on the fixture 3 is polished). The main arm 5 is equipped with a driving wheel 7, a tensioning wheel 8, a contact wheel 9 and a main sanding belt 10. The driving wheel 7 receives the power provided by the polishing motor 6 and serves as the active part of the main sanding belt 10. In order to drive the main sanding belt 10 more stably, the driving wheel 7 is The wheel diameter is usually large. In theory, the main sanding belt 10 can be stably operated only by arranging the contact wheel 9 and the driving wheel 7 on the main arm 5. However, in actual production, this arrangement has obvious defects: first, it will cause installation problems. It is difficult to directly put the straightened main sanding belt 10 on the contact wheel 9 and the driving wheel 7; second, the main sanding belt 10 will be continuously stretched during the working process, and a large amount of heat will be generated during the polishing process, which will inevitably cause the main sanding belt 10 to relax, and then slip, which will reduce the efficiency of polishing;Therefore, when the driving wheel 7 and the contact wheel 9 are arranged, the tensioning wheel 8 is often arranged, and in order to adapt to the automated work, the tensioning wheel 8 is often made into a separate module, and the tension of the main sanding belt 10 is adjusted by controlling the power of the tensioning module. The transmission module 11 is located above the turntable 4, and a key wheel 14 is installed on the transmission module 11. The auxiliary arm 12 is located on the left side of the main arm 5, and the adjustment module 13 is located between the auxiliary arm 12 and the turntable 4. The contact wheel 9 and The tensioning wheel 8 is installed on the auxiliary arm 12 from front to back, and the tensioning wheel 8 and the contact wheel 9 are both installed on the left side of the auxiliary arm 12. A secondary abrasive belt 15 is wound around the key wheel 14, the contact wheel 9 on the auxiliary arm 12, and the tensioning wheel 8. The contact wheel 9 on the main arm 5 is coaxially arranged with the contact wheel 9 on the auxiliary arm 12. An elastic roller 17 is installed between the auxiliary arm 12 and the main arm 5. The roller surface of the elastic roller 17 is made of elastic water-absorbing material, such as a highly elastic water-absorbing sponge. The distance from the right side of the auxiliary abrasive belt 15 to the symmetric plane of the main abrasive belt 10 is greater than the radius of the saw blade workpiece 16.

[0048] The main sanding belt 10 is caused to slide back to zero by the base 2 so that its own symmetry plane coincides with the midpoint of the saw blade workpiece 16. The transmission module 11 is driven by the polishing motor 6 to drive the driving wheel 7 and the key wheel 14 to rotate at the same speed at the same time. The main sanding belt 10 and the auxiliary sanding belt 15 move right with the base 2 to polish the saw blade workpiece 16 until the symmetry plane of the auxiliary sanding belt 15 coincides with the midpoint of the saw blade workpiece 16. The main sanding belt 10 and the auxiliary sanding belt 15 return to zero with the base 2 to polish another saw blade workpiece 16.

[0049] As an embodiment of the present invention, refer to Figure 1 and Figure 2 , the output shaft of the polishing motor 6 is arranged in the front-to-back direction, and the polishing motor 6 has a shutdown self-locking function, the transmission module 11 includes a driving tooth 111, a driven tooth 112, a right shaft 113 and a left shaft 114, the driving tooth 111 is installed on the output shaft of the polishing motor 6, and the two driven teeth 112 are respectively engaged with the left and right sides of the driving tooth 111, the right shaft 113 is inserted on the main arm 5, the driven tooth 112 on the right side of the driving tooth 111 and the driving wheel 7 are installed on the right shaft 113, the left shaft 114 passes through the driven tooth 112 on the left side of the driving tooth 111, and the left shaft 114 is mounted on the turntable 4, and the key wheel 14 is installed on the left shaft 114;

[0050] Both the driving gear 111 and the driven gear 112 use bevel gears. The two driven gears 112 are exactly the same. According to actual production needs, select a suitable transmission ratio to determine the gear ratio of the driving gear 111 and the driven gear 112. During installation, first fix the main arm 5 on the turntable 4, then insert the right shaft 113 into the main arm 5, and connect the two through a pair of bearings, then respectively put the driven gear 112 and the driving wheel 7 from the left and right ends of the right shaft 113, and make a transition fit between them. The keyway and the taper sleeve can be used for positioning, and then the driving gear 111 is installed at the output of the polishing motor 6. The polishing motor 6 is fixed to the turntable 4 with bolts, and the driving tooth 111 is correctly meshed with the installed driven tooth 112. Finally, the left end of the left shaft 114 passes through another driven tooth 112, the baffle 122 and the key wheel 14 in turn, and a pair of bearing seats are used to mount the left shaft 114 on the turntable 4. During the above process, the driven tooth 112 should be correctly meshed with the driving tooth 111. In addition, the auxiliary abrasive belt 15 and the main abrasive belt 10 have opposite directions of rotation, and the chip removal directions of the two are also opposite. When using them, attention should be paid to setting the corresponding chip removal port.

[0051] As an embodiment of the present invention, refer to Figure 1 , the key wheel 14 is equal to the outer diameter of the driving wheel 7, the auxiliary arm 12 is coaxially installed with the tensioning wheel 8 on the main arm 5, the main sanding belt 10 and the auxiliary sanding belt 15 are of the same material, length, width and thickness; the tensioning wheel 8 has an autonomous adjustment function to achieve the tensioning of the sanding belt. The main sanding belt 10 and the auxiliary sanding belt 15 may have a certain difference in length during the polishing process due to slight differences in the working environment (different from their own temperature rise). At this time, the adjustment amplitude of the two tensioning wheels 8 will deviate. This deviation belongs to normal tensioning and does not require manual adjustment to make the adjustment amplitude of the two tensioning wheels 8 consistent. However, during installation, in order to ensure that the operating state of the main sanding belt 10 and the auxiliary sanding belt 15 is consistent, so as to ensure the consistency of the saw blade surface polishing, it is necessary to ensure that the two tensioning wheels 8 are coaxial.

[0052] As an embodiment of the present invention, refer to Figure 3 , the spacing between the main sanding belt 10 and the auxiliary sanding belt 15 is half of the sum of the outer diameter of the saw blade workpiece 16 and the center hole diameter of the saw blade workpiece 16, so that when the base 2 returns to zero, the distance from the main sanding belt 10 to the inner edge of the saw blade workpiece 16 and the distance from the auxiliary sanding belt 15 to the outer edge of the saw blade workpiece 16 are equal, so that the main sanding belt 10 and the auxiliary sanding belt 15 simultaneously contact and detach from the surface of the saw blade workpiece 16; taking a multi-blade saw blade with a center hole diameter of 50mm, an outer diameter of 250mm, a blade thickness of 3.5mm, and a number of teeth of 18 produced by our company as an example, the spacing between the main sanding belt 10 and the auxiliary sanding belt 15 should be controlled at 150mm, so that the distance from the main sanding belt 10 to the inner edge of the saw blade workpiece 16 and the distance from the auxiliary sanding belt 15 to the outer edge of the saw blade workpiece 16 are both 25mm.

[0053] As an embodiment of the present invention, refer to Figure 4 The positioning module 13 includes a positioning motor 131, a positioning screw 132, a positioning slide rail 133 and a positioning slider 134. The positioning motor 131 is installed on the left side of the turntable 4, and the positioning motor 131 has a bidirectional rotation function. The positioning screw 132 is connected to the right side of the output shaft of the positioning motor 131, and the positioning screw 132 passes through the auxiliary arm 12 and is mounted on the turntable 4. The positioning slide rail 133 is arranged above the turntable 4, and the positioning slider 134 is installed between the positioning slide rail 133 and the auxiliary arm 12. A limiting frame 121 is installed on the auxiliary arm 12. The limiting frame 121 is arranged with two baffles 122 in the left and right directions. The baffle 122 and the left shaft 114 are clearance-matched, and the key wheel 14 is installed between the two baffles 122; in order to reduce the friction between the baffle 122 on the limiting frame 121 and the key wheel 14 and the left shaft 114, on the one hand, the side of the baffle 122 adjacent to the key wheel 14 A boss is provided on the top, so that the small end face of the boss can contact the left and right end faces of the key wheel 14, thereby reducing friction; on the other hand, the baffle 122 and the left shaft 114 are matched to reduce the size, and the gap between the two should be obvious, so as to avoid the contact between the left shaft 114 and the baffle 122 during the rotation process, thereby avoiding the friction between the left shaft 114 and the baffle 122 during the rotation process; during installation, first use bolts to fix the adjustment slide rail 133 on the turntable 4, then install the adjustment slide rail 133 under the auxiliary arm 12, and then insert the adjustment slider 134 on the adjustment slide rail 133 to slide the auxiliary arm 12 left and right, and then screw the adjustment screw 132 from the left side of the auxiliary arm 12 and pass through the auxiliary arm 12, and then use a pair of bearing seats to mount the adjustment screw 132 on the turntable 4, and finally use a coupling to drive the adjustment motor 131 and the adjustment screw 132.

[0054] As an embodiment of the present invention, refer to Figure 5 and Figure 6The left shaft 114 includes a transmission section 1141 and a belt-changing section 1142 from right to left. The transmission section 1141 is set to a spline structure. The key wheel 14 is provided with a spline groove matching the transmission section 1141. The belt-changing section 1142 includes a base 11421, a connector 11422 and a separator 11423. The base 11421 is connected to the left side of the transmission section 1141. The connector 11422 can be made into a structure similar to a single-head stud. A thread is arranged on the circumference of the right end. A corresponding threaded hole is arranged inside the left side of the base 11421. The connector 11422 is threadedly connected to the base 11421; the left end of the connector 11422 is a regular hexagonal prism structure, which can be easily disassembled and assembled using a wrench. A card slot is arranged inside the separator 11423 to card the connector 114 22, the axial diameter of the base 11421 gradually increases from right to left to the size of the aperture of the inner hole of the baffle 122 and remains constant; when disassembling the auxiliary sanding belt 15, first use the positioning motor 131 to move the auxiliary arm 12 to the left end of the left shaft 114, so that the inner circle of the baffle 122 on the left side is in close contact with the base 11421 part with a large shaft diameter, thereby forming a stable support for the left shaft 114 with the help of the auxiliary arm 12; under the self-locking function of the polishing motor 6 when it is shut down, the left shaft 114 cannot rotate. At this time, use a wrench to rotate the connecting body 11422 to screw it out of the base 11421, and create a gap between the base 11421 and the separating body 11423, so that the auxiliary sanding belt 15 can be placed in or taken out. The reset installation of the auxiliary sanding belt 15 after replacement is the opposite of the above process.

[0055] Working principle: The present invention simplifies the reciprocating horizontal movement (i.e., "coming" and "going back") of the abrasive belt during the polishing process of a saw blade in the prior art, so that the abrasive belt can complete the surface polishing of a saw blade with only one "coming" or "going back". The advantage of this is that each time the abrasive belt "comes" or "goes back", it will complete the polishing of a saw blade, thereby improving the efficiency of saw blade polishing, and in the switching between "coming" and "going back", the side edge at the front end of the abrasive belt also alternates, that is, both sides of the abrasive belt will be evenly worn in the alternating process, thereby extending the life of the abrasive belt;

[0056] Specifically, in order to complete the surface grinding and polishing of a saw blade in one "come" or "return", an auxiliary sanding belt 15 is arranged on the basis of the original main sanding belt 10. In the initial state of polishing (i.e., the base 2 returns to the zero state), the symmetry surface of the main sanding belt 10 coincides with the center of the saw blade workpiece 16, and the auxiliary sanding belt 15 is located at the edge of the saw blade. During polishing, the "come" process occurs first: the base 2 drives the main sanding belt 10 and the auxiliary sanding belt 15 to move to the right, the main sanding belt 10 polishes the surface of the saw blade from the inside to the outside, and the auxiliary sanding belt 15 polishes the surface of the saw blade from the outside to the inside. When the polished surfaces of the main sanding belt 10 and the auxiliary sanding belt 15 coincide, the two complete the first polishing of the saw blade surface (i.e., the "come" process in the prior art, see Figure 7), then the main abrasive belt 10 and the auxiliary abrasive belt 15 continue to move rightward until the symmetry plane of the auxiliary abrasive belt 15 coincides with the midpoint of the saw blade to complete the polishing of the saw blade (i.e., the "return" process in the prior art, see Figure 8 ); the "return" process occurs again, the saw blade is replaced or turned over, and the base 2 drives the main sanding belt 10 and the auxiliary sanding belt 15 to move leftward, and the movement of the main sanding belt 10 and the auxiliary sanding belt 15 is opposite to the above process;

[0057] In order to make the main sand belt 10 and the auxiliary sand belt 15 rotate in opposite directions relative to the saw blade, so as to increase the polishing speed of the main sand belt 10 and the auxiliary sand belt 15 and make the polishing amount of the main sand belt 10 and the auxiliary sand belt 15 the same, thereby ensuring the consistency of the polishing of the saw blade surface, a bevel gear transmission is used, and the driving tooth 111 drives two identical driven teeth 112 to drive the main sand belt 10 and the auxiliary sand belt 15 to rotate in opposite directions;

[0058] In order to synchronize the motion states of the main sanding belt 10 and the auxiliary sanding belt 15, that is, to contact or separate from the surface of the saw blade at the same time, thereby ensuring the consistency of the meshing of the two driven teeth 112 with the active teeth 111, thereby avoiding the vibration or tilt of the main sanding belt 10 or the auxiliary sanding belt 15, so as to improve the polishing quality of the saw blade surface, the spacing between the main sanding belt 10 and the auxiliary sanding belt 15 is set to half of the sum of the outer diameter of the saw blade workpiece 16 and the aperture of the center hole of the saw blade workpiece 16, so that the distance from the main sanding belt 10 to the inner edge of the saw blade workpiece 16 and the distance from the auxiliary sanding belt 15 to the outer edge of the saw blade workpiece 16 are equal;

[0059] In order to polish saw blades with different outer diameters, the auxiliary sanding belt 15 can slide left and right on the turntable 4 to change the distance between the auxiliary sanding belt 15 and the main sanding belt 10; specifically, a positioning slide rail 133 is arranged on the turntable 4, and a positioning slider 134 is installed under the auxiliary arm 12. The auxiliary arm 12 drives the auxiliary sanding belt 15 to slide on the turntable 4 through the positioning slide rail 133 and the positioning slider 134. The above sliding process is realized by the positioning motor 131 cooperating with the positioning screw 132, and the positioning motor 131 is connected to the auxiliary arm 12. A baffle 122 is installed on the connected limit frame 121, and the key wheel 14 is installed between the two baffles 122. The baffle 122 pushes the key wheel 14 to slide axially on the left shaft 114. In order to make the left shaft 114 drive the key wheel 14 to rotate to realize the rotation of the auxiliary sanding belt 15, the transmission section 1141 of the left shaft 114 is set as a spline structure, and the key wheel 14 is provided with a corresponding spline groove structure inside. The spline connection allows the key wheel 14 to be positioned circumferentially while having axial freedom.

[0060] In order to facilitate the replacement of the auxiliary sanding belt 15, a belt changing section 1142 is provided at the left end of the left shaft 114. The belt changing section 1142 includes a base 11421, a connecting body 11422 and a separating body 11423. The connecting body 11422 is threadedly connected to the base 11421. The separating body 11423 is mounted on the turntable 4 by a bearing seat, and the left end of the connecting body 11422 is made into a regular hexagonal prism similar to a nut shape, so as to be clamped inside the separating body 11423. When the connecting body 11422 and the separating body 11423 rotate on the bearing seat, the connecting body 11422 can be rotated from the inside of the base 11421. out, thereby creating a gap between the base body 11421 and the separation body 11423, so as to disassemble and install the auxiliary sanding belt 15, and in order to facilitate the above process, the shaft diameter of the base body 11421 is designed so that the baffle 122 can form a stable support for the base body 11421. Before disassembling and installing the auxiliary sanding belt 15, the auxiliary arm 12 is first moved to the left end of the left shaft 114, so that the inner hole of the baffle 122 contacts the large shaft diameter part of the base body 11421, and with the help of the shutdown self-locking function of the polishing motor 6, the connecting body 11422 is rotated with a wrench to screw out the gap between the base body 11421 and the separation body 11423;

[0061] In order to further improve the polishing effect, an elastic roller 17 with a roller surface made of water-absorbing elastic material is installed between the auxiliary arm 12 and the main arm 5. The elastic roller 17 can not only absorb the polishing liquid remaining on the surface of the saw blade workpiece 16 during the polishing process, but also further improve the smoothness of the saw blade surface through flexible contact with the saw blade surface.

[0062] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic saw blade surface grinding and polishing device for polishing a saw blade workpiece (16), comprising a frame (1), a base (2), a fixture (3), a turntable (4), a main arm (5) and a polishing motor (6), wherein a driving wheel (7), a tensioning wheel (8), a contact wheel (9) and a main abrasive belt (10) are mounted on the main arm (5), characterized in that: It also comprises a transmission module (11), a secondary arm (12) and a positioning module (13), wherein the transmission module (11) is located above the turntable (4), and a key wheel (14) is installed on the transmission module (11), the secondary arm (12) is located on the left side of the main arm (5), and the positioning module (13) is located between the secondary arm (12) and the turntable (4), the contact wheel (9) and the tension wheel (8) are installed on the secondary arm (12) from front to back, and a secondary abrasive belt (15) is wound around the key wheel (14) and the contact wheel (9) and the tension wheel (8) on the secondary arm (12), and the distance from the right side of the secondary abrasive belt (15) to the symmetry plane of the main abrasive belt (10) is greater than the radius of the saw blade workpiece (16); The main sanding belt (10) is driven by the base (2) to slide back to zero so that its own symmetry surface coincides with the midpoint of the saw blade workpiece (16); the transmission module (11) is driven by the polishing motor (6) to drive the driving wheel (7) and the key wheel (14) to rotate at the same speed at the same time; the main sanding belt (10) and the auxiliary sanding belt (15) move rightward along with the base (2) to polish the saw blade workpiece (16) until the symmetry surface of the auxiliary sanding belt (15) coincides with the midpoint of the saw blade workpiece (16); the main sanding belt (10) and the auxiliary sanding belt (15) return to zero along with the base (2) to polish another saw blade workpiece (16).

2. The automatic saw blade surface grinding and polishing device according to claim 1, characterized in that: The output shaft of the polishing motor (6) is arranged in the front-to-back direction; the transmission module (11) comprises a driving tooth (111), a driven tooth (112), a right shaft (113) and a left shaft (114); the driving tooth (111) is mounted on the output shaft of the polishing motor (6); the two driven teeth (112) are respectively meshed on the left and right sides of the driving tooth (111); the right shaft (113) is inserted into the main arm (5); the driven tooth (112) on the right side of the driving tooth (111) and the driving wheel (7) are both mounted on the right shaft (113); the left shaft (114) passes through the driven tooth (112) on the left side of the driving tooth (111); the left shaft (114) is mounted on the turntable (4); and the key wheel (14) is mounted on the left shaft (114).

3. The automatic saw blade surface grinding and polishing device according to claim 2, characterized in that: The key wheel (14) has an outer diameter equal to that of the driving wheel (7); the auxiliary arm (12) is coaxially mounted with the tension wheel (8) on the main arm (5); the auxiliary arm (12) is coaxially arranged with the contact wheel (9) on the main arm (5); and the main sanding belt (10) and the auxiliary sanding belt (15) are made of the same material, length, width and thickness.

4. The automatic saw blade surface grinding and polishing device according to claim 3, characterized in that: The tension wheel (8) is mounted on the left side of the auxiliary arm (12), and the contact wheel (9) is mounted on the left side of the auxiliary arm (12).

5. The automatic saw blade surface grinding and polishing device according to claim 1, characterized in that: The spacing between the main abrasive belt (10) and the auxiliary abrasive belt (15) is half the sum of the outer diameter of the saw blade workpiece (16) and the diameter of the central hole of the saw blade workpiece (16).

6. The automatic saw blade surface grinding and polishing device according to claim 1, characterized in that: The positioning module (13) comprises a positioning motor (131), a positioning lead screw (132), a positioning slide rail (133) and a positioning slider (134); the positioning motor (131) is mounted on the left side of the turntable (4); the positioning lead screw (132) is connected to the right side of the output shaft of the positioning motor (131); the positioning lead screw (132) passes through the auxiliary arm (12) and is mounted on the turntable (4); the positioning slide rail (133) is arranged above the turntable (4); the positioning slider (134) is mounted between the positioning slide rail (133) and the auxiliary arm (12); a limiting frame (121) is mounted on the auxiliary arm (12); two baffles (122) are arranged on the limiting frame (121) along the left-right direction; the baffles (122) are clearance-matched with the left shaft (114); and the key wheel (14) is mounted between the two baffles (122).

7. The automatic saw blade surface grinding and polishing device according to claim 6, characterized in that: The left shaft (114) comprises, from right to left, a transmission section (1141) and a belt changing section (1142); the transmission section (1141) is configured as a spline structure; and the key wheel (14) is provided with a spline groove matching the transmission section (1141).

8. The automatic saw blade surface grinding and polishing device according to claim 7, characterized in that: The belt-changing section (1142) comprises a base body (11421), a connecting body (11422) and a separating body (11423); the base body (11421) is connected to the left side of the transmission section (1141); the connecting body (11422) is connected to the left side of the base body (11421); the separating body (11423) is clamped on the outside of the connecting body (11422); and the axial diameter of the base body (11421) gradually increases from right to left until it reaches the diameter of the inner hole of the baffle (122) and remains constant.

9. The automatic saw blade surface grinding and polishing device according to claim 8, characterized in that: The positioning motor (131) has a bidirectional rotation function, and the polishing motor (6) has a shutdown self-locking function.

10. The automatic saw blade surface grinding and polishing device according to claim 1, characterized in that: An elastic roller (17) is installed between the auxiliary arm (12) and the main arm (5), and the roller surface of the elastic roller (17) is made of elastic water-absorbing material.

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